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Constraints  can be put on the data to be plotted; they are of the form: expression relation expression where relations  are =,!=,<,<=,>,>=. Examples are TE>3.5, I>10e3, and PGAS=2. You can use and and or, represented by * and + respectively, with the relational operators. For example, a constraint of (Z=8)+(Z=9) will plot y vs x when z is either 8 or 9. You also can use NODATA  in constraints: COMMENT=NODATA, and COMMENT="NODATA" are valid. You can use and and or with the relational operators. Valid contraints are:

    "(Z=8) OR (Z=9)"
    "IP BETWEEN 1.5 and 2.5"
    "IP NOT BETWEEN 1.5 and 2.5"

Up to fifteen constraints can be used. The constraints are anded together so only records satisfying all of the conditions will be plotted.

Marilee Thompson
Fri Jul 11 17:05:56 EDT 1997